maint: Replace instances of goto in liboctave where convenient. * CMatrix.cc (operator >>): Replace "goto done;" with "return is;". * CNDArray.cc (operator >>): Replace "goto done;" with "return is;". * lo-specfun.cc (gammainc (various)) : Rename return variable result to retval. Replace "goto done;" with "return XXX ();" where XXX is a container such as Matrix, NDArray, FloatMatrix, FloatNDArray. * lo-specfun.cc (gammainc (double, double, err), gammainc (float,float, err)): Move input validation to top of function. * randpoisson.c (poisson_cdf_lookup): Place action of if statement on separate line. * cmd-edit.cc (do_decode_prompt_string): Replace goto statement with break. Rename variable result to retval. Rename variable temp to tmpstr. Place cases of switch statement in mostly alphabetical order. Use single quotes when describing a single character. Use temporary number buffer of 32, not 128. * oct-sort.cc (sort): Replace "goto fail;" with "return;"

--- a/liboctave/numeric/randpoisson.c	Sun Jan 31 19:26:47 2016 -0800
+++ b/liboctave/numeric/randpoisson.c	Mon Feb 01 13:29:21 2016 -0800
@@ -350,7 +350,8 @@
           p[i] = (double) k;
           continue;
         }
-      if (++k < tableidx) goto nextk;
+      if (++k < tableidx)
+        goto nextk;
 
       /* We only need high values of the table very rarely so we
        * don't automatically compute the entire table. */
@@ -401,7 +402,8 @@
           p[i] = (float) k;
           continue;
         }
-      if (++k < tableidx) goto nextk;
+      if (++k < tableidx)
+        goto nextk;
 
       while (tableidx < TABLESIZE)
         {